You've posed some good questions. These are important factors when shopping for a softshell jacket.
Firstly, no this jacket is no windproof. It is made with Marmot's "M3" softshell material which is the lightest and most breathable, but least wind-resistant of their softshells. It is best used for aerobic activities in cool conditions, according to the Marmot webpage.
Comparing the Approach to the Apex: The Apex is windproof, Approach is not. Apex is fleece lined, Approach is not. Approach will be more breathable and lighter. Apex will be thicker, and likely more durable. Both are water resistant.
Jackets that would be more comparable to the Apex Bionic include the Marmot Leadville, Outdoor Research Logic, and Mountain Hardwear Andriod. Honestly, these are all going to perform relatively the same, and brand selection is a matter of personal choice/bias.
Hope that helps.